phpjs/functions/array/array_unshift.js

php.js offers community built php functions in javascript

function array_unshift(array) {
  // From: http://phpjs.org/functions
  // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
  // +   improved by: Martijn Wieringa
  // +   improved by: jmweb
  // %        note 1: Currently does not handle objects
  // *     example 1: array_unshift(['van', 'Zonneveld'], 'Kevin');
  // *     returns 1: 3
  var i = arguments.length;

  while (--i !== 0) {
    arguments[0].unshift(arguments[i]);
  }

  return arguments[0].length;
}